Is there a 120-ohm resistor at the end of the line?
Ensure baud rate, parity, data bits, and stop bits match the slave device exactly. Increase Response Timeout: modbus poll bytes missing error fixed
Increase the in the Connection Setup (try 1000ms or higher). Is there a 120-ohm resistor at the end of the line
For years, forums suggested the same things: "Change the baud rate" or "Check your cable." But those were band-aids. Here are the real causes that the addresses. modbus poll bytes missing error fixed